apartment
area
bridge
bridges
cable
cablestayed
central
communication
communications
crosses
crossing
district
domestic
duct
guyed
heat
heating
hot
hotwater
house
industrial
industry
large
largediameter
line
main
mains
one
outdoor
overwater
pipe
pipeline
pipes
public
pylon
residential
river
site
stayed
steam
steel
steely
supply
surface
suspension
technology
transition
utilities
warm
water